14.Waves and Sound
easy

સમાન તણાવ ધરાવતા સોનોમીટરના તારની મૂળભૂત આવૃત્તિ $500 Hz$ છે,એક તારમાં તણાવ કેટલું  .... $\%$ વધારતાં $5$ સ્પંદ સંભળાય $?$

A

$1$

B

$2$

C

$3$

D

$4$

Solution

(b) To produce $5$ beats/sec.

Frequency of one wire should be increase up to $505 \,Hz$. i.e. increment of $1\%$ in basic frequency.

$n \propto \sqrt T $ or $T \propto {n^2}$

==> $\frac{{\Delta T}}{T} = 2\frac{{\Delta n}}{n}$

==> percentage change in Tension =$2\,(1\% ) = 2\% $

Standard 11
Physics

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